AZTEC — The "person of interest" in the slaying of a Bloomfield woman will remain jailed at the San Juan County Detention Center on a $100,000 cash-only bond.

Michael Graham, 40, is charged with being a felon in possession of an explosive device and tampering with evidence, both fourth-degree felonies.

While executing search warrants in connection to the death of Brandy Robinson, 29, San Juan County Sheriff's Office investigators found homemade explosives hidden in Graham's truck and guns in his bedroom.

Robinson, a mother-of -three, was found stabbed to death in a rural area south of Farmington on June 22. Graham, who had been involved in a romantic relationship with Robinson, was arrested on June 28.

Michael Graham (Courtesy of San Juan County Adult Detention Center)

On Thursday morning, prosecutors asked and received a week-long continuance for Graham's preliminary hearing. Magistrate Judge Barry Sharer granted the request but told the state to come prepared to next week's hearing.

The continuance was needed because a bomb technician who was going to be called as a witness was unavailable because of training, said Chief Deputy San Juan County District Attorney Dustin O'Brien.

Shelby Bradley, Graham's attorney, opposed the continuance and argued his client should be released if prosecutors needed more time to prepare for the hearing.

"His criminal history is long, and it's full of violent and firearms-related offenses," Assistant District Attorney Steven Johnston countered. "He has a history of violence, a history of firearms, and he's charged with being in possession of firearms and explosive devices."

Graham has prior felony convictions for negligent use of a firearm in 1998, bringing contraband to jail in 1999 and aggravated assault and possession of a controlled substance in 2000.

The conviction for negligent use of a firearm stemmed from a 1996 incident in which Graham shot a man in the legs and head, according to court documents. The man, Nick Felix, survived the shooting.

Graham argued during the 1998 trial that he shot Felix in self defense. He was charged with attempted murder, and the jury convicted him of a lesser offense.

On Thursday, when Sharer denied the request to release Graham, Bradley tried to get Graham's bond reduced or changed to cash or surety. Sharer also rejected that request.

No one mentioned Robinson's death during Graham's hearing on Thursday.

Bradley declined to comment on Graham being named a "person of interest" by the sheriff's office in the homicide investigation. Graham's brother, who attended the hearing, also declined to comment on the allegations.